tdf#126828 don't crash fetching cmis properties from disposed SfxBaseModel

Change-Id: Ie064632667b40201e0d266c64e3068c4d1983c7d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/92283
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
(cherry picked from commit db677c854a37031235b0f42b4f4f48560149754f)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/92289
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
diff --git a/sfx2/source/doc/sfxbasemodel.cxx b/sfx2/source/doc/sfxbasemodel.cxx
index a136f74..9849ac8 100644
--- a/sfx2/source/doc/sfxbasemodel.cxx
+++ b/sfx2/source/doc/sfxbasemodel.cxx
@@ -2458,8 +2458,10 @@
    throw lang::NoSupportException("SfxBaseModel controls all the sent notifications itself!" );
}

Sequence< document::CmisProperty > SAL_CALL SfxBaseModel::getCmisProperties()
Sequence<document::CmisProperty> SAL_CALL SfxBaseModel::getCmisProperties()
{
    if (impl_isDisposed())
        return Sequence<document::CmisProperty>();
    return m_pData->m_cmisProperties;
}

@@ -2597,7 +2599,9 @@

uno::Sequence< document::CmisVersion > SAL_CALL SfxBaseModel::getAllVersions( )
{
    uno::Sequence< document::CmisVersion > aVersions;
    uno::Sequence<document::CmisVersion> aVersions;
    if (impl_isDisposed())
        return aVersions;
    SfxMedium* pMedium = m_pData->m_pObjectShell->GetMedium();
    if ( pMedium )
    {